Codifies the PR body format the repo has converged on across its first
122 pull requests, which until now lived only as an implicit pattern
agents and contributors had to reverse-engineer from prior PRs.
- **`.github/PULL_REQUEST_TEMPLATE.md`** — `## Summary`, optional `##`
sections, then `## Manual Verification` as a checkbox list. Gitea falls
back to `.github/` when `.gitea/` is absent, and the GitHub mirror reads
the same path, so one file covers both.
- **`CONTRIBUTING.md`** — new "Pull request descriptions" subsection under
Branching & Pull Requests, documenting the same three-part structure.
Section names were chosen by frequency across all 122 PRs: `## Summary`
(86) and `## Manual Verification` (63) are the clear majority. The later
`## Manual Verification Checklist` (12, PRs 90-113), `## Test plan` (11)
and `## Verification` (3, PRs 121-122) variants are drift away from that
baseline, not a newer standard, so the template restores the dominant
form. Checkboxes ship unchecked but are meant to be checked before the
PR opens, matching the 585-to-12 ratio of `[x]` to `[ ]` in merged PRs.
rootiest
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